mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
0731bd4a53
Whoops. Pointers are not classes and do not have a difference_type member. You have to get that from iterator_traits. I'm not sure why this succeeded on MSVC, but it was clearly wrong.
186 lines
5.6 KiB
C++
186 lines
5.6 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_io_reader_VTKPolyDataReader_h
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#define vtk_m_io_reader_VTKPolyDataReader_h
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#include <vtkm/io/reader/VTKDataSetReaderBase.h>
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#include <vtkm/cont/ArrayPortalToIterators.h>
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#include "iterator"
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namespace vtkm {
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namespace io {
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namespace reader {
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namespace internal {
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template<typename T>
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inline vtkm::cont::ArrayHandle<T> ConcatinateArrayHandles(
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const std::vector<vtkm::cont::ArrayHandle<T> > &arrays)
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{
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vtkm::Id size = 0;
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for (std::size_t i = 0; i < arrays.size(); ++i)
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{
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size += arrays[i].GetNumberOfValues();
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}
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vtkm::cont::ArrayHandle<T> out;
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out.Allocate(size);
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typedef typename vtkm::cont::ArrayPortalToIterators<
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typename vtkm::cont::ArrayHandle<T>::PortalControl>::IteratorType
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IteratorType;
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IteratorType outp =
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vtkm::cont::ArrayPortalToIteratorBegin(out.GetPortalControl());
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for (std::size_t i = 0; i < arrays.size(); ++i)
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{
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std::copy(vtkm::cont::ArrayPortalToIteratorBegin(arrays[i].GetPortalConstControl()),
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vtkm::cont::ArrayPortalToIteratorEnd(arrays[i].GetPortalConstControl()),
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outp);
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typedef typename std::iterator_traits<IteratorType>::difference_type
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DifferenceType;
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std::advance(
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outp, static_cast<DifferenceType>(arrays[i].GetNumberOfValues()));
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}
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return out;
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}
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} // namespace internal
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class VTKPolyDataReader : public VTKDataSetReaderBase
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{
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public:
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explicit VTKPolyDataReader(const char *fileName)
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: VTKDataSetReaderBase(fileName)
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{ }
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private:
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virtual void Read()
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{
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if (this->DataFile->Structure != vtkm::io::internal::DATASET_POLYDATA)
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{
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throw vtkm::io::ErrorIO("Incorrect DataSet type");
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}
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//We need to be able to handle VisIt files which dump Field data
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//at the top of a VTK file
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std::string tag;
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this->DataFile->Stream >> tag;
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internal::parseAssert(tag == "POINTS" || tag == "FIELD");
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if(tag == "FIELD")
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{
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std::string name;
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this->ReadFields(name);
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this->DataFile->Stream >> tag;
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internal::parseAssert(tag == "POINTS");
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}
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// Read the points
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this->ReadPoints();
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// Read the cellset
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std::vector<vtkm::cont::ArrayHandle<vtkm::Id> > connectivityArrays;
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std::vector<vtkm::cont::ArrayHandle<vtkm::IdComponent> > numIndicesArrays;
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std::vector<vtkm::UInt8> shapesBuffer;
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while (!this->DataFile->Stream.eof())
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{
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vtkm::UInt8 shape = vtkm::CELL_SHAPE_EMPTY;
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this->DataFile->Stream >> tag;
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if (tag == "VERTICES")
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{
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shape = vtkm::io::internal::CELL_SHAPE_POLY_VERTEX;
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}
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else if (tag == "LINES")
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{
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shape = vtkm::io::internal::CELL_SHAPE_POLY_LINE;
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}
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else if (tag == "POLYGONS")
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{
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shape = vtkm::CELL_SHAPE_POLYGON;
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}
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else if (tag == "TRIANGLE_STRIPS")
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{
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shape = vtkm::io::internal::CELL_SHAPE_TRIANGLE_STRIP;
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}
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else
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{
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this->DataFile->Stream.seekg(-static_cast<std::streamoff>(tag.length()),
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std::ios_base::cur);
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break;
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}
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vtkm::cont::ArrayHandle<vtkm::Id> cellConnectivity;
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vtkm::cont::ArrayHandle<vtkm::IdComponent> cellNumIndices;
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this->ReadCells(cellConnectivity, cellNumIndices);
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connectivityArrays.push_back(cellConnectivity);
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numIndicesArrays.push_back(cellNumIndices);
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shapesBuffer.insert(shapesBuffer.end(),
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static_cast<std::size_t>(cellNumIndices.GetNumberOfValues()),
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shape);
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}
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vtkm::cont::ArrayHandle<vtkm::Id> connectivity =
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internal::ConcatinateArrayHandles(connectivityArrays);
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vtkm::cont::ArrayHandle<vtkm::IdComponent> numIndices =
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internal::ConcatinateArrayHandles(numIndicesArrays);
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vtkm::cont::ArrayHandle<vtkm::UInt8> shapes;
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shapes.Allocate(static_cast<vtkm::Id>(shapesBuffer.size()));
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std::copy(shapesBuffer.begin(), shapesBuffer.end(),
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vtkm::cont::ArrayPortalToIteratorBegin(shapes.GetPortalControl()));
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vtkm::cont::ArrayHandle<vtkm::Id> permutation;
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vtkm::io::internal::FixupCellSet(connectivity, numIndices, shapes, permutation);
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this->SetCellsPermutation(permutation);
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if (vtkm::io::internal::IsSingleShape(shapes))
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{
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vtkm::cont::CellSetSingleType<> cs;
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switch(shapes.GetPortalConstControl().Get(0))
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{
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vtkmGenericCellShapeMacro(
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(cs = vtkm::cont::CellSetSingleType<>(CellShapeTag(), "cells")));
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default:
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break;
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}
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cs.Fill(connectivity);
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this->DataSet.AddCellSet(cs);
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}
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else
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{
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vtkm::cont::CellSetExplicit<> cs(0, "cells");
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cs.Fill(shapes, numIndices, connectivity);
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this->DataSet.AddCellSet(cs);
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}
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// Read points and cell attributes
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this->ReadAttributes();
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}
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};
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}
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}
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} // namespace vtkm::io:reader
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#endif // vtk_m_io_reader_VTKPolyDataReader_h
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